Gastec 23L Quick-measuring Detector tubes Chlorine dioxide ClO2 (0.025~1.2ppm)
ManufacturerGastec(View more products from this manufacturer)
Model23L
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Indicator: 0.1~0.6ppm
Measuring Range:
+ 0.025 to 0.05 ppm, Number of Pump Strokes 2
+ (0.05) to 0.6 ppm, Number of Pump Strokes 1
+ 0.6 to 1.2 ppm, Number of Pump Strokes 1/2
Sampling Time: 2 minute per pump stroke
Colour Change: White → Pale Green
Coefficient of Variation: 10% (for 0.05 to 0.2 ppm), 5% (for 0.2 to 0.6 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 2 minute per pump stroke | |||
| Detecting Limit | 0.005 ppm (n=2) | |||
| Colour Change | White → Pale Green | |||
| Reaction Principle | Chlorine dioxide oxidises the indicatorto produce pale green discolouration. | |||
| Coefficient of Variation | 10% (for 0.05 to 0.2 ppm), 5% (for 0.2 to 0.6 ppm) | |||
| Shelf Life | 1 Year | |||
| Corrections for temperature & humidity | Unnecessary | |||
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. | ||||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Ammonia | No | No | |
| Carbon monoxide, Carbon dioxide | No | No | |
| Hydrogen chloride | No | No | |
| sulphur dioxide | No | No | |
| Nitrogen dioxide | + | Pale green | |
| Halogen gases | + | Pale green | |
| Hydrogen sulphide | No | No | |
| Organic vapours | No | No |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.1 ppm(2014) | 0.3 ppm(2014) | - |
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